Postural Hand Synergies for Tool Use

@article{Santello1998PosturalHS,
  title={Postural Hand Synergies for Tool Use},
  author={Marco Santello and Martha Flanders and John F. Soechting},
  journal={The Journal of Neuroscience},
  year={1998},
  volume={18},
  pages={10105 - 10115}
}
Subjects were asked to shape the right hand as if to grasp and use a large number of familiar objects. The chosen objects typically are held with a variety of grips, including “precision” and “power” grips. Static hand posture was measured by recording the angular position of 15 joint angles of the fingers and of the thumb. Although subjects adopted distinct hand shapes for the various objects, the joint angles of the digits did not vary independently. Principal components analysis showed that… 
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